I want to transfer my programs from a TI - 84 to a casio fx- 9750GII, how do I do this?

Normally 500 x 20% = 100

https://www.google.com/search?q=Casio+fx-9750GII+percentages

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They're both giving you the same number.
1.953125E-03 means 1.953125 * 10^-3, which is 0.001953125 .

Use the equivalent definition
cot(x) =1/ tan(x)

If you have access to a working Casio FX-9750G II with the original OS (not hacked), try transferring its OS to your calculator using not the USB port but the (round) IO port. If that does not work, scour the hacking site where you got the idea to hack your FX-9750GII to look for an answer.

Is it possible to change d/dx into d/dy on a Casio fx-9750GII? If so, how?

I am sorry, but the Casio FX-9750GII does not manipulate radicals (roots). Maybe you mean fractions?

The first graphing calculator was invented by Casio Computers. of Japan in 1985 It was the Casio FX-7000.The lead engineer on the Casio 7000 development team was Hideshi Fukaya. About 5 years later, Texas Instruments introduced its first .
The Ti 84 Plus was introduced in 2004. Before the TI 84 plus there werer other graphing calculators by TI: 80/81/82/83/85/86/92/73

From the Run Mode (select it and press exe), enter Setup (Shift Menu) and then highlight Angle. Press the function key that correponds to Deg and then press Exit.

The manual for the Casio Fx-9750GII is here: http://support.casio.com/manualfile.php?rgn=1&cid=004002013 . Other calculator manuals are here: http://support.casio.com/manuallist.php?rgn=1&cid=004 .

I hope this helps.

Cindy Wells

I compared two cables and noticed that they are identical. One insulating part on the TI cable is longer than the corresponding part on the Casio cable. But no matter, let us assume that the calculators share the same 2.5 mm connection.
You can verify the hardware compatibility as follows

1. Use the Casio I/O cable to connect two TI calculators. The Casio cable wakes up the TI84PLus
   
2. Use the TI I/O cable to connect to Casio calculators. The TI cable wakes up the Casio FX9550GII but not the CFX-9750GPlus nor the Graph 35. But that may not mean too much.
3. Create a Matrix ( a 3X3 ) on one TI8xPLUS and transfer it to another TI8xPLUS using the Casio Cable.
4. Create a small (3x3) matrix on one Casio C/FX-9750G/PLUS and transfer it to another C/FX-9750G/Plus.
5. If you have been successful in any of the above you may try to transfer an object from a TI to a casio or from a Casio to a TI and the cable that worked above.

My feeling is that you cannot. I tried it
When I tried to transfer from a TI to a Casio, the Casio kept displaying RECEIVING , AC to cancel. The TI returned an Xmit ERROR
When I tried to transfer from a Casio to TI, the Casio quickly returned a Transmit Error, while the TI kept waiting for a transmission.

There may be other issues of memory organization, naming conventions, systems commands and program commands so on.

For each problem you want to have your students solve try to supply the procedures for both types of calculators. This, in my opinion, is the reasonable way to go. A benefit to you is that you learn the expert use of both types of calculators.
If you care to specify what kind of programs you intend to transfer from one to the other, one may be able to point you to some resources available on the web.

If you have to restrict your selection to one or the other the Casio wins "hands tied behind its back". If you need convincing read on.

Advantages of Casio
Newer technology
About half the price
About twice the Ram
Uses iconic menus
Most screens have tab/menus: No need to scroll.
Conic graphic embedded in OS, not need for an extra application
Dynamic graphing embedded in OS, no need for an extra application
Has a reset button
Several types of statistical graphs that do not exit on TI83 (pie chart)
Ability to select the integration algorithm
Better screen resolution.